I'm not older, I'm just almost mids 30's ... and I can't see the point of facebook.
Some of my friends have posted encyclopedic volumes about their life on it, not to mention all the what are you doing now mini-posts.
I think I have a few pictures from a few years ago, that my wife made me post.
Sometimes I visit facebook.
All I can say is that given the vast amount of information that facebook has at their disposal, concerning even a single person, they can basically slot you into a whole bunch of categories ... not least of which is political affiliations.
Given your address, political affiliations, facebook could potentially predict elections and throw bribes at the right politicians in each state to get things done in their favor, which is typically "I sponsor you for $1mil, now you give me tax dodge/incentives worth $100mil".
It's amazing how much privacy people will give up for something free, which is actually worth less than nothing.
I recall that my ex-GF once gave out her email to a random group of people with clipboards, that were offering free lollypops for email addresses.
A few weeks later, she was forced to closed her email account due to the voluminous amount of spam (this was before the proliferation of spam filters) - 100's of emails per day ....